Backlight controls
In some examples, a display device includes a panel, a scaler circuit, and a backlight control circuit. In some examples, the scaler circuit receives a panel identification from the panel and determines a backlight module driving configuration based on the panel identification. In some examples, the backlight control circuit receives the backlight module driving configuration from the scaler circuit and controls a backlight for the panel based on the backlight module driving configuration.
1 . A display device, comprising:
a panel;
a scaler circuit to receive a panel identification from the panel and to determine a backlight module driving configuration from a list of panel identifications with corresponding backlight information based on the panel identification; and
a backlight control circuit to receive the backlight module driving configuration from the scaler circuit and to automatically control a backlight for the panel based on the backlight module driving configuration.
2 . The display device of claim 1 , further comprising a timing controller and memory, wherein the timing controller is in electronic communication with the memory.
3 . The display device of claim 2 , wherein the timing controller is to read the panel identification from the memory and to provide the panel identification to the scaler circuit.
4 . The display device of claim 2 , wherein the memory comprises an electrically erasable programmable read-only memory (EEPROM).
5 . The display device of claim 1 , further comprising a backlight module in electronic communication with the backlight control circuit.
6 . The display device of claim 5 , wherein the backlight control circuit controls the backlight for the panel by driving the backlight module.
7 . The display device of claim 1 , wherein the scaler circuit is in electronic communication with the backlight control circuit via an inter-integrated circuit (I2C) interface.
8 . A method, comprising:
reading from memory in a display device a panel identification;
accessing a look-up table to determine the backlight settings, wherein the look-up table comprises a plurality of panel identifications with corresponding backlight information;
determining, by a scaler circuit of the display device, backlight settings based on the panel identification; and
controlling a backlight of a panel in the display device using the backlight settings independent of user intervention.
9 . The method of claim 8 , further comprising sending the backlight settings from the scaler circuit to a backlight control circuit.
10 . The method of claim 8 , wherein controlling the backlight of the panel comprises driving a backlight module of the panel.
11 . A non-transitory tangible computer-readable medium comprising instructions when executed cause a processor to:
cause a panel identification to be obtained;
receive the panel identification from a panel by a scaler circuit of the panel;
search, by the scaler circuit, a list of backlight configurations using the panel identification, wherein the list comprises a plurality of panel identifications with corresponding backlight information; and
send a selected backlight configuration from the scaler circuit to a backlight control circuit.
12 . The non-transitory tangible computer-readable medium of claim 11 , wherein the processor is to select the selected backlight configuration from the list of backlight configurations based on the panel identification.
13 . The non-transitory tangible computer-readable medium of claim 11 , wherein the processor is to cause a backlight of the panel to change by sending the selected backlight configuration.
14 . The display device of claim 1 , wherein the panel identification includes data indicating at least one of a manufacturer identifier, a serial number, a display size, a supported timing, or a resolution device type.
15 . The display device of claim 1 , wherein the scaler circuit is configured to receive the panel identification from the panel via an auxiliary channel of a display interface between the scaler circuit and the panel.
16 . The method of claim 8 , wherein the backlight settings include backlight configurations for at least one of a light emitting diode (LED) current, an LED dimming type, an LED pulse-width modulation (PWM) duty linearity, or a protection mechanism.
17 . The non-transitory computer-readable medium of claim 11 , wherein the panel identification includes data indicating at least one of a manufacturer identifier, a serial number, a display size, a supported timing, or a resolution device type.
18 . The non-transitory computer-readable medium of claim 11 , wherein the list of backlight configurations is stored in the form of a look-up table indicating a correspondence between a plurality of panel identifications and corresponding backlight information.